The University of Adelaide Applications are invited for the position of Professor of Zoology in the university of Adelaide, South Australia. The Professor will be required to offer a course of Lectures and Practical Work in Elementary Animal Biology, suitable for students of Science, Medicine and Agriculture, together with an advanced course in Zoology for students in Science. A demonstrator and a collector will be provided. Salary, £1,100 per annum. Applications with testimonials, statement of academic qualifications, experience, copies of publications, and a recent photograph, should be forwarded to the Registrar, The University of Adelaide, South Australia, to reach him not later than August 1st, 1921. Candidates must indicate the earliest date at which they can commence duties. Further information may be obtained from : (a) The Agent-General for South Australia, (b) The Commissioner for Australia, 61 Broad- SCIENCE PROFESSORS WANTED Applications are invited for vacant positions in Physics, Biology, and Modern Languages at Mount Allison University, Sackville, New Brunswick, Canada. Apply to B. C. BORDEN, President An Opening For An ASSISTANT PROFESSOR OF PHYSICS in a University in the South. Opportunity for growth for a high type, trained man with teaching experience. Address S, care of SCIENCE, Garrison, N. Y. ZOOLOGIST, M.S., in Bacteriology, Entomology, Embryology, Histology; A.M., in Cytology, Protozoology, Neurology; (Dissertation for Ph. D. on Invertebrate Morphology, nearly complete), has studied abroad, seeks post as Professor or Head of Department, with part time for research. Eight years teaching experience, (in Zoology, Comparative Anatomy, Histology, Embryology and Biology). Address "K" care of Science, Garrison, N. Y. Publications of Carnegie Institution of Washington No. 280. No. 302. No. 216. No. 303. No. 279. No. 309. Benedict, F. G., W. R. Miles, Paul Roth Harris, J. A. and F. G. Benedict. A Smith, H. Monmouth. Gaseous Ex- The publications of the Institution now number over 400 volumes, the subjects including Anatomy, Archæology, Astronomy, Botany, Chemistry, Climatology, Economics and Sociology, Embryology, Experimental Evolution and Heredity, Engineering, Folk-Lore, Geology, History, International Law, Literature, Mathematics, Medicine, Nutrition, Paleontology, Philology, Physics, Stereochemistry, Terrestrial Magnetism, Zoology. Classified and descriptive lists will be sent postpaid on application. All communications should be addressed to CARNEGIE INSTITUTION OF WASHINGTON WASHINGTON, D. C. W ANNOUNCEMENT E are greatly pleased to be able to announce to the readers of Science and to all users of scientific apparatus and instruments in general that we have recently secured the services of DR. PAUL E. KLOPSTEG who has already entered upon his duties as Technical Supervisor of Development and Manufacturing. While a student at the University of Minnesota, from which he received his Ph.D. degree in 1916, Dr. Klopsteg devoted particular attention to the study of electrical measuring instruments. He served on the instructional staff of that institution for several years as assistant in the departments of Electrical Engineering and Physics, and was later promoted to the rank of Assistant Professor of Physics. In 1917 he entered the Government service, spending a year as Electrical Engineer in the Ordnance Department, during which time he aided in the development of the Aberdeen Chronograph for the measurement of projectile velocities. In the fall of 1918, as a result of his work upon this instrument, Dr. Klopsteg became identified with Leeds and Northrup, who had undertaken its manufacture. Later his activities were centered in the Sales and Advertising Department, where he has been largely responsible for the collection and preparation of technical and scientific information upon instruments and methods. Since the organization of the Central Scientific Company it has been our ambition to produce the BEST apparatus in design, workmanship, finish, durability and adaptability to the purpose for which intended, in whatever field of trade demands might lead. When our business was almost entirely that of a High School Supply House, we strove to realize this ambition, adding from time to time to the personnel of the organization men who were thoroughly familiar with this field and who could be trusted to intelligently guide our efforts. When the demands led us later into the field of College Physics and of Industrial and Engineering Chemistry, further additions were made to the organization so that we might be equipped to render intelligent and accurate service to users of apparatus in these fields. The European War having cut us off from former sources of supply, our Manufacturing Department was called upon to develop almost at once the manufacture of numerous physical and chemical instruments for which there was most urgent demand. Again additions were made to both engineering and manufacturing divisions of men whose training would enable us quickly and accurately to develop these instruments. With the coordination of the technical efforts of these various groups under the supervision of Dr. Klopsteg, we believe that we are in a position to render a service to users of scientific apparatus which will justify our ambition to make the name "CENCO" stand always and only for that which is best. As we have always been ready in the past to place upon our apparatus a guarantee of complete satisfaction, backed up in case of doubt by immediate replacement or full credit, we now repeat this guarantee with the additional promise that whether it be a simple piece of high school physical apparatus, a piece of chemical glassware, an ordinary quantitative laboratory device, or a precise measuring instrument, the name CENCO upon it will stand as evidence that the need which it serves has been carefully analyzed, the piece has been scientifically designed to meet this need, has been carefully made of the proper materials to fulfill its purpose and has met the most rigid test of its fitness when completed. This is our promise. CENTRAL SCIENTIFIC COMPANY Repeated object lessons have demonstrated that nearly all progress in science has resulted in important advances in industry G-E Research Laboratory Schenectady, N. Y. Among the many products developed by the General For further information address Supply Department, Schenectady Office. General Electric General Office Company Laboratory Bottles, with flat glass stopper; these bottles are made in our own private moulds of a new formula lime glass, developed under our direction and which, while not equal to Pyrex, Nonsol or similar glass in stability, is far superior in this respect to the ordinary flint glass mostly used in the manufacture of bottles. They were the first bottles to be made in the U. S. of the squat shape, heretofore available only in imported bottles. They hold the full capacity indicated, are of excellent appearance and are suitable in every way for use as reagent bottles where labelling is done in the laboratory. ARTHUR H. THOMAS COMPANY WHOLESALE, RETAIL AND EXPORT MERCHANTS LABORATORY APPARATUS AND REAGENTS WEST WASHINGTON SQUARE PHILADELPHIA, U. S. A. |